Using a compiled language is not a premature optimization if you're not sacrificing expressiveness.
With that said, Go is not the best choice. Like, for anything.
I mean, I get it, it's easy to pick up and use. Coroutines and channels are useful, and make easy to write async stuff.
But god damn, it's so dull and boring, there's no joy in it. We're programmers, we're supposed to extract abstractions and express them in the code we write. And IMO your language should definitely try to help with that.
Instead, Go wants you to do err, value = ..., if err == nil { ... } on almost every single line. You can't adequately compose stuff. Well, you can try, but you quickly run into its ugly, verbose syntax for anonymous functions or lack of generics.
Maybe I'm not getting something, maybe it's just not for me, I dunno. But next time I need high performance compiled language, I'll use Swift or maybe even Rust. Also I think Scala Native is somewhat stable already, gotta look into that.
The question to be answered is why are you porting it? Fun and giggles? Hoping to achieve better performance? Scale? Portability? Correctness? Simplicity? Support?
I'd say most of the time its for fun and giggles. Which I think is as fine a reason as all the others, but when its costing someone's elses money, maybe you should be more considerate.
People want to switch away from python because of all the pain they feel from it.
The JVM as far as I know is still the runtime king, faster then Go.